iPhone 6 Sound Problems

Hello,

yesterday i got a totaly new iPhone 6.

The Problem is, it has big sound Problems. If i make a call i can't hear the other side and the microphone dont work neither. The microphone dont work, too if i make a video. In a call i can't click on the speaker button. It's just unavaible. The iPhone don't recognize if i plug in headphones. I checked all settings an restored it over iTunes. System sounds like the clicking while typing work. I can't even call now the Apple Hotline. Are there any possibiltys to fix it or is the hardware broken?